CVE-2020-25220

HIGH
New! CVE Severity Now Using CVSS v3

The calculated severity for CVEs has been updated to use CVSS v3 by default. CVEs that do not have a CVSS v3 score will fall back CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.

Description

The Linux kernel 4.9.x before 4.9.233, 4.14.x before 4.14.194, and 4.19.x before 4.19.140 has a use-after-free because skcd->no_refcnt was not considered during a backport of a CVE-2020-14356 patch. This is related to the cgroups feature.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1868453

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.194

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.140

https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.233

https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-4.14.y&id=82fd2138a5ffd7e0d4320cdb669e115ee976a26e

https://lists.debian.org/debian-lts-announce/2020/10/msg00032.html

https://lists.debian.org/debian-lts-announce/2020/10/msg00034.html

https://security.netapp.com/advisory/ntap-20201001-0004/

https://www.spinics.net/lists/stable/msg405099.html

Details

Source: MITRE

Published: 2020-09-10

Updated: 2021-01-20

Type: CWE-416

Risk Information

CVSS v2

Base Score: 7.2

Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.9

Severity: HIGH

CVSS v3

Base Score: 7.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Impact Score: 5.9

Exploitability Score: 1.8

Severity: HIGH

Tenable Plugins

View all (2 total)

IDNameProductFamilySeverity
142176Debian DLA-2420-2 : linux regression updateNessusDebian Local Security Checks
high
141445Photon OS 2.0: Linux PHSA-2020-2.0-0288NessusPhotonOS Local Security Checks
high